Find a) the mean, 
, of the data, b) the deviation from the mean for each data item, and c) the sum of the deviations.3, 12, 6, 9, 7
A. a) mean: 7.4, b) deviations: 4.4, -4.6, 1.4, -1.6, 0.4, c) sum: 37
B. a) mean: 6.8, b) deviations: -4.4, 5.6, -1.4, -1.6, 0.4, c) sum: 37
C. a) mean: 7.4, b) deviations: -4.4, 4.6, -1.4, 1.6, -0.4, c) sum: 0
D. a) mean: 6.8, b) deviations: 4.4, -5.6, 1.4, 1.6, -0.4, c) sum: 0
Answer: C
Mathematics
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